Machine for drilling nuts and the like.



10.817,587. PATENTED NPR. 10,1906.

- v M. NELSON.

MACHINE POR DNILLING NUTSy AND THBLIKE.

' APPLIOATIONHLBD JUNE2o,19o4. v f

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nl UHT lli .'l" Il l I E l No. 81?;587. i @PATENTED APR.10;.1906.

A v A M. NELSON. l n MACHINE EUR DRILLING NUTS AND THE- LIKB. 1

APPLICATION FILED JUNE 20, 1904.4

Minessesl l chine.

figures.

A is the frame ofthe machine, preferably.

rA'rnNr oir-rion- MARTIN NELSON, or ToRoNro, CANADA. MACHINE Fon -D'RILLING NUTS 'AND THE LIKE.

Specification of Letters Patent.

'Patented Api-n 1o, 1906.l

y Application filed .lune 20. 1904. Serial No. 213,330.`

To (LEZ whom, z't 'n1/(Lgf concern.:

Be it known that I, MARTIN NELSON, of th city of Toronto, Province of Ontario, Canada, have invented certain new and useful Improvements in Machines for Drilling Nuts and the Like, of which the following is a specification.

The object of my invention is to devise a' machine 'for boring and ta ping or reaming nuts and the like which wil possess great capacity without requiring excessive power to operate it; and it consists, essentially, of a suitably-supportedv rotatable frame carrying a plurality of nut-sockets, a corresponding series of drill-spindles suitably supported over the sockets, means for positively feeding the drill-spindles, means for retracting the spindles, means for rotating the spindles, and means for' rotating the frame.

My invention further llies in the details of construction hereinafter more vparticularly described and then definitely claimed.

Figure 1 is a front elevation of the ma-l F1g...2 1s a sectional-elevation'of part of the machine. Fig. 3 is a plan view of the slides operating the drill-spindles. Fig. 4 is a plan view of the gearing driving the. drillspindles. Fig. 5 is a detail in plan of three of the nut-sockets.

In the drawings like letters of reference indicate corresponding parts in the different formed, as shown, of two standards provided with suitable cross connections.

C is a central vertical tapered post extendingup from the base.

tapered sleeve E, fitted over the post C and having bearingsthereon.

AOn the post is formed a iiange F, above which is formed a flange or collar G on the sleeve E. Between these two is fitted a plate H, in which Vare formed apertures fitted with hardened -metal balls. bearing is thus provided atvthe bottom of the drillframe. The drillframe is provided `with a disk or head I, provided on the outside with a worm-gear a. With this worm-gear meshes a worm b, journaled at one side of the frame A. `This worm derives motion by I means of bevel-gearing c from a shaft J, also 'journaled onA the frame of the machine. This shaftcarries suitable fast and loose pulleys,-v 155. a transverse shaft K, journaled in suitable'v` which are connectedV by belt 'with a pulleyfon An edective thrustbearings at the top of the frame. This shaft is provided with a series-of driving-pulleys d, whereby it may be driven from a suitable line of shafting and the speed varied at will. Secured to the shaft K 1s a `bevel-pinion e, meshing with a bevel-wheel f, secured to a verticalshaft L. '.'fhis shaft is journaled in the upper cross-bar of the frame A, andits lower end is fitted within a cap g, fitted on the upper end of the sleeve E. On thisshaft is secured a gear-wheel M, which 'meshes with the gear-pinions h, Vslidable with;feather-'keys on the drill-.spindlesN These drill-spindles are vertically. movable `and rotatable inthe disks or heads I` and O `of the drill-frame. Secured to each spindle is a collar i. Below this collar islocated a loose collar' j. ,Be-

tween these two collars is-forlned a ball-race provided with. suitable balls to form .a ballbearing. A coil-spring k bears against the collar j andagainst vthe disk or head I. The

springs thus tendto vnormally maintain the drill-spindles retracted, and owing to 'the' l ball-bearing arran ement just' described the upward pressure o the springs causes little, if any, retarding friction. Above the disk or head O `andsuitably supported therefrom ing adapted to allow a drill-spindle at the front of the machine to lift uickly from its Dis a drill-frame provided with a central work, lthen after a short dwe l to be brought quickly down to its work again, and subse- The lower end of each d ill-spindle isfiprovided Awith a socket S. Within this socketthe drill-chuck N of any suitable-construction, is made vertically adjustableby means of the set-screws o. Thus the drills T- ma be set to suit the thickness of the stock on w 'ch they are to bev employed `or tocompensate forwear. Below each drill is formed a drillvsocket -U This drill-socket maybe of any suitableconstruction. As shown, it consists merely` ofjasupport for the nut and a plate p, cut to the .shape of the sides of the nut to The upper end of each sli e is provided located a cam-ring R, the cam m thereon be- Ique'ntly slowly fed forward. until its work is IOO prevent it from turning as the drills` are rotated.

Suitable devices are employed for supplyingl suitable lubricant to theywork; but .l do not claim anyv particular novelty in this feature orc the device. i

The operation ol the device is substantially as follows: 'the rotation of the transverse shaft Kthe vertical shaft Vll is set in motion, and this by mean's of the gearing M 7L operates the drills. At the same time the shaft J is set in operation by the transverse shaft and by means of thebevel-gearing c and the Worm-gearingb a gives the whole drill-rame a rotary motion. -This rotary motion by moving the slides Q over the cam m causes the drills to be successively brought down to their work, fed until the Work is coinpleted, and then retracted, the finished nut peing removed at the front of the machine by rand.

It will be noted that the cam-ring R is detachably secured to the frame of the machine above the slides it is intended to operate. Thus by changing the cam-ring the speed of the feed of the drills may be regulated to suit the-thickness of the Work being operated on or to change the rapidity of the feed. This is a valuable construction, as the machine is expected to Work on nuts oi diferent'thicknesses and different sizes of bore.

This machine will rapidly and effectively bore the nuts as they come from the former,

' described in my prior applicatioin' filed on or about June 20, 1904, Serial No. 213,329. It lis not only rapid in its operation, but ef- `icient means have been provided to make it as lrictionless as possible in its operation7 so that a minimum of power is required to op erate it. y

l have described the machine as used for boring nuts. By substituting reamers for drills the machine makes an efficient reamer. By using taps the machine may be adapted for tapping the nuts; but in this case the sockets would require to be replaced by the slide-supports used in tapping-machines, and in the case of large nuts the gearing for the spindles would require to be changed to give slower speed.

What i. claim as my invention is- In a machine for boring nuts and the like the combination of a frame; a drill-trame rotatably supported thereon; means for rotating the drill-frame; a plurality of drill-spindies rotatably and slidably carried thereby; a head rotating with the drill-frame; slides vertically movable therein on feathenkeys, one over each drill-spindle; a friction-roller carriedby each slide at its upper end; a staf tionary cam with which the said frictionrollersengage; springs each engaging one of the drill-spindles and the frame and tending to maintain the drill-spindles in Contact with the slides; means for rotating' the spindles; and nut-sockets formed one below each spindle, substantially as described.

Toronto, June 8, 1904.

MARTIN NELSON. In presence ofv J. EDW. MAYBEE, P. R. JoNEs. 

